It’s believed that our moods are sometimes by colours. Many scientists are doing some research (研究) on this subject.
She looks forward to _____ the Great Wall.
—Can you tell me ______ ? —Yeaterday afternoon.
—Thanks for your help! — _______. Don’t mention it B. That’s right C. It doesn’t matterD. I did nothing
You mustn’t forget ______ your dictionary when you come here tomorrow.
—Where is Tom? —I heard him ______ with our English teacher when I passed the teacher’s lounge.